What routing protocols do people use on their networks? Particularly inside.

Does anyone in the world actually use IS-IS ?

I am not interested in what network runs what, just how many networks run various protocols.

Rough idea of network size would be nice, and any partcular reasons you prefer one to the other.

thanks for satisfying my curiosity JM

In the words of Iljitsch van Beijnum's book "BGP", which I was reading over Easter (I know, I'm a sad person): "If you are implementing a large-scale IP network or have unusual requirements, you should definitely read up on all the protocols so you can make an informed decision. However, most small-to-medium sized networks running just IP should go ahead and select OSPF: it does the job, doesn't have any huge disadvantages, and is readily available." - Donald Neal Donald Neal | "I suspect most samba Technical Specialist | developers are already Operations Engineering | technically insane. Of course, Integration & Services Divn. | since many of them are Alcatel NZ Ltd | Australians you can't tell." All opinions mine only. | - Linus Torvalds ------------------------------------------------------------------------------ "This communication, including any attachments, is confidential. If you are not the intended recipient, you should not read it - please contact me immediately, destroy it, and do not copy or use any part of this communication or disclose anything about it. Thank you. Please note that this communication does not designate an information system for the purposes of the Electronic Transactions Act 2002." ------------------------------------------------------------------------------